目 录目 录....................................................................................................................................................1摘 要....................................................................................................................................................2前 言....................................................................................................................................................3第 1 章 任务分析与方案确定.............................................................................................................41.1数据采集电路分析..........................................................................................................41.2数据处理和显示电路分析..............................................................................................51.2.1 单片机系统分析......................................................................................................51.2.2 显示与键盘分析......................................................................................................61.3 继电器电路分析................................................................................................................71.4 通信接口电路分析............................................................................................................7第 2 章 系统硬件设计........................................................................................................................92.1 数据采集电路.......................................................................................................................92.1.1 DS18S20 数字温度传感器性能描述....................................................................92.1.2 DS18S20 数字温度传感器与 AT89C51 连接.........................................................92.2 数据处理和显示电路........................................................................................................102.2.1 AT...
